Sideline: Private 2nd Number
Sideline: Private 2nd Number Summary
Sideline: Private 2nd Number is a with in-app purchases iOS app in Tools by Pinger, Inc.. Released in Aug 2015 (10 years ago). It has 14.3K ratings with a 4.36★ (good) average. Based on AppGoblin estimates, it reaches roughly 43.9K monthly active users and generates around $<10K monthly revenue (100% IAP / 0% ads). Store metadata: updated Mar 11, 2026, version 16700.
Recent activity: 13 new ratings this week View trends →
Data tracking: SDKs and third-party integrations were last analyzed on Feb 21, 2026.
Store info: Last updated on App Store on Mar 11, 2026 (version 16700).
Sideline: Private 2nd Number was last scanned for SDKs 2026-02-21. Below is the overview of third party companies detected in the app. The full list of raw SDKs, app permissions and unknown SDKs is available here.
Google
Facebook
OpenID
Alamofire
nanopb
Braze
Firebase
Zendesk
Adjust4.36★
Ratings: 14.3K
Screenshots
App Description
Set up a Sideline number and enjoy all the benefits of having a second line today. With Sideline, you can use your new mobile number for private texting, text chat, contact management, and more. We created Sideline to help streamline your communications by bringing you a second phone number with a complete set of features.
Create a new local number, send unlimited texts, and set up your own custom voicemail as you would with your existing phone line. Use mobile phone tools that help keep your conversations organized and help make sure you never miss what’s important. Your Sideline second phone number also includes convenient features like Auto-Reply, text reminders, and coordinated number management that can help you control your conversations on any device.
Use Sideline as a reliable private texting app as well when you set up a second number. Never miss a conversation with automatic chat replies if you miss a call. With your second texting number you can send unlimited SMS, MMS, or text messages and always stay connected.
Sideline is your app for convenient calling & texting. Set up a second phone line and start connecting when you download Sideline today!
SIDELINE FEATURES:
SET UP A SECOND PHONE NUMBER
- Your second line includes all the features you’d expect, from Caller ID to voicemail
- Set up a new phone number with a local area code
- All calls are cellular (not VoIP), so your second number is just as reliable as your primary one
USE A SECOND TEXTING NUMBER
- Send unlimited sms, mms, and text messages to all of your contacts
- With your second line, enjoy private texting at any time
- Access your Sideline number online and text from another device
FEATURES THAT WORK FOR YOU
- Auto-Reply moves a missed call to text so you never miss a conversation
- Set up a custom voicemail for your new second number and read transcripts of each message
- Transfer (or port) an existing number to your second line from another device or landline
SMART TOOLS TO MANAGE YOUR CONVERSATIONS
- Split a Sideline number between multiple devices to access anywhere
- Automatically set up a reminder for tasks related to a certain phone call
- Identify new callers, save contact details, and take notes after calls
- Save and reuse messages you frequently need to send
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SUBSCRIPTION DETAILS
Sideline is a paid service. Subscriptions are automatically billed monthly or a